import React, { useContext } from 'react'
import classNames from 'classnames'

import { MenuContext } from './menu'

export interface MenuItemProps {
    index?: string, //必传 
    disabled?: boolean,
    className?: string,
    style?: React.CSSProperties
}


const MenuItem: React.FC<MenuItemProps> = (props) => {
    // 使用上下文
    const context = useContext(MenuContext)

    const { index, disabled, className, style, children } = props
    const classes = classNames('menu-item', className, {
        'is-disabled': disabled,
        'is-active': context.index === index
    })
    const handleClick = () => {
        if (context.onSelect && !disabled && (typeof index === 'string')) {
            context.onSelect(index)
            alert(index)
        }
    }



    return (
        <li className={classes} style={style} onClick={handleClick}>
            {children}
        </li>
    )
}
MenuItem.displayName = 'MenuItem'

export default MenuItem